1969 Mustang Electrical Issues(please Help)

69stanguy

New Member
Nov 27, 2016
5
0
1
32
Hi everyone. Having issues with my 69 mustang coupe. 302. Replaced battery,regulator,starter selinoid,and alternator. She runs great except I'm noticing the lights are dimming and flickering when rev it. Also the battery is being drained completely. Having to jump it and my battery charger started to spark. Any suggestions
 

Attachments

  • Sponsors(?)


tos

SN Certified Technician
Apr 27, 2001
896
68
59
Cincinnati Ohio
Sounds like you have a wire grounding somewhere? Did you replace all these things because of the battery and light issues or did they show up after?
Some (many) new voltage regulators coming from China are junk so keep that in mind. Check your engine grounds and frame grounds although the grounds wont cause your battery to drain but they will affect your lights.
 

69stanguy

New Member
Nov 27, 2016
5
0
1
32
I replaced it thinking it would solve the problem. But it's still making my voltages go off the charts! Could it be bad wiring. I've only had the car for 4 days. Came from Dallas . A lot of original parts
 

69stanguy

New Member
Nov 27, 2016
5
0
1
32
I replaced it thinking it would solve the problem. But it's still making my voltages go off the charts! Could it be bad wiring. I've only had the car for 4 days. Came from Dallas . A lot of original parts
 

tos

SN Certified Technician
Apr 27, 2001
896
68
59
Cincinnati Ohio
Yes it could be bad or miswired wiring.
It could be a number of things. Not knowing the history makes it more difficult.
Does it have any aftermarket electronics installed? Like stereo or amp? Gauges?
Is there anything wired directly to the battery or solenoid posts other than the factory wires?
If not then I would start by looking for wires that have been chewed thru by animals first. Like under
the hood and under the dash. If its not blowing fuses then its likely shorting under the hood or its something that may be wired direct to the battery.
 

69stanguy

New Member
Nov 27, 2016
5
0
1
32
On the alternator, does the t bone/ rubber part have anything to do with my problem??? I pulled the old alternator off and found one connector corroted to where it wasn't even touching. When I replaced the new alternator, I just tied down to the posts, without the rubber piece.please feel free to contact me 346 316-0627 Andrew.
 

tos

SN Certified Technician
Apr 27, 2001
896
68
59
Cincinnati Ohio
That rubber is there to keep the two separated so they don't short against each other or something else. Make sure the terminals aren't touching each other or the casing. If at any time they shorted out while the battery was connected you may have damaged the alternator or voltage regulator.

Take a volt reading at the battery while the car is running and see what you get compared to what you get at the battery with the key off.

it is possible that you got a bum alternator too so it might be a good idea to have it checked. Most auto parts places will check it for free.
 
Thread starter Similar threads Forum Replies Date
YadiStang 1969 mustang. Need help with door lock actuator rod 1965 - 1973 Classic Mustangs -General/Talk- 0
M 1969 mustang 302 clevor breaking up at high rpm 1965 - 1973 Classic Mustangs -General/Talk- 4
R 1969 mustang headlight upgrade wiring kit 1965 - 1973 Classic Mustangs -General/Talk- 0
6 Budget 1969 mustang rear end build 1965 - 1973 Classic Mustangs -General/Talk- 1
S Should I mod the 302 or run the 390? 1965 - 1973 Classic Mustangs -General/Talk- 35
R 1969 mustang heater core 1965 - 1973 Classic Mustangs -General/Talk- 4
R 302 to 347 Stroker 1965 - 1973 Classic Mustangs -General/Talk- 3
Saberdemon For Sale 1969-1970 mustang hood Interior Exterior Parts 0
C 1969 mustang not charging the battery Classic Mustang Specific Tech 3
J 1969 mustang ignition problem please help Classic Mustang Specific Tech 3
YadiStang And one more (under hood) question for 1969 Base Mustang 1965 - 1973 Classic Mustangs -General/Talk- 0
YadiStang 1969 Base Mustang (under hood) Question 1965 - 1973 Classic Mustangs -General/Talk- 4
G 1969 Mustang owners Classic Mustang Specific Tech 6
C 1969 Ford Mustang 302 small block V8 Classic Mustang Specific Tech 1
M 1969 Mustang Grandé Trunk interior 1965 - 1973 Classic Mustangs -General/Talk- 2
6 Can I run 245/45/17 and 275/45/17 on a 1969 mustang with altered suspension 1965 - 1973 Classic Mustangs -General/Talk- 0
mustangmike6996 1969 Mustang Seats/1971+ Classic Mustang Specific Tech 1
S Progress Thread 1969 Mustang coupe 1965 - 1973 Classic Mustangs -General/Talk- 13
4 1969 428CJ Mach 1 Q Code 4spd (close ratio) w/38k miles 1965 - 1973 Classic Mustangs -General/Talk- 6
MoDriver SOLD 1965-1966 & 1969-1970 Ford Mustang Exterior Door Handle Kit Interior Exterior Parts 0
C 1969 mustang hood The Welcome Wagon 2
S Expired 1971 Mustang Fastback --429 Cobra Jet Ram Air ---4spd ---mint !! Classic Mustangs For Sale 0
F Story Of The 1969 Mustang And Scarebird Brakes... 1965 - 1973 Classic Mustangs -General/Talk- 3
O 1969 Mustang Headlights Not Working 1965 - 1973 Classic Mustangs -General/Talk- 1
T Expired 1969 1970 Mustang Fold Down Rear Seat $1,000 Interior Exterior Parts 3
DrakeRobinson68 Hello From Ca With A '68 In Progress 1965 - 1973 Classic Mustangs -General/Talk- 8
M For Sale 1969 Mustang R Code 428 Cj Rolling Ca. Body + Classic Mustangs For Sale 7
YadiStang Total Timing Mystery 1969 Mustang 302 1965 - 1973 Classic Mustangs -General/Talk- 8
S 1969 Mustang Gt Convertible 1996 - 2004 SN95 Mustang -General/Talk- 2
rusty428cj 1969 Mustang Race Car That I Have Owned Since 1970 Classic Mustang Specific Tech 16
YadiStang 1969 Mustang...new Rear Drums Rubbing 1965 - 1973 Classic Mustangs -General/Talk- 4
YadiStang 1969 Mustang Bad Cv Regulator?? 1965 - 1973 Classic Mustangs -General/Talk- 10
YadiStang 1969 Mustang - Dash Pad Removal 1965 - 1973 Classic Mustangs -General/Talk- 1
YadiStang 1969 Mustang Headlight Install Procedure 1965 - 1973 Classic Mustangs -General/Talk- 6
YadiStang 1969 Mustang Dash Lights Diffuser (correct) Color? 1965 - 1973 Classic Mustangs -General/Talk- 4
M Electrical 1969 Mustang Underhood Wiring Classic Mustang Specific Tech 3
S 1969 Mustang Fastback 351w/auto Trans To 428/4 Speed Toploader Conversion 1965 - 1973 Classic Mustangs -General/Talk- 2
FaithTruthWisdom 17x8 Fit Issue On 1969 Mustang. 1965 - 1973 Classic Mustangs -General/Talk- 4
YadiStang 1969 Base Mustang Convertible, Proper Radiator Setup? 1965 - 1973 Classic Mustangs -General/Talk- 9
J Expired 1969 Pro Street Ford Mustang Fastback Classic Mustangs For Sale 2
G 1969 Shelby Mustang Gt 350 4-speed With Original Paint 1965 - 1973 Classic Mustangs -General/Talk- 2
G Barn Find - One Owner 1969 Mustang Shelby Gt500 1965 - 1973 Classic Mustangs -General/Talk- 0
MRaburn Barn Find – 1969 Ford Mustang Boss 302 StangNet Site News 0
Sparxx SOLD 1969 Mustang Parts Interior Exterior Parts 0
M SOLD 1969 Mustang Convertible $5000 Westford, Ma Classic Mustangs For Sale 3
dawtips Expired 1969 Ford Mustang - $11,500 Classic Mustangs For Sale 0
J 331 1969 mustang build!! Classic Mustang Specific Tech 2
S Expired 1969 Mustang Fastback. Classic Mustangs For Sale 0
MRaburn Ford Mustang Racer Paul Brown 1969-2012 StangNet Site News 0
J Expired 1969 Mustang 302 Motor $2500 Drivetrain Parts 1
Similar threads